If \( x+y+z=a \) and the minimum value of \( \frac{a}{x}+\frac{a}{y... VIDEO
If \( x+y+z=a \) and the minimum value of \( \frac{a}{x}+\frac{a}{y}+\frac{a}{z} \) is \( 81^{\lambda} \), then the value of \( \lambda \) is
\( \mathrm{P} \)
(a) \( \frac{1}{2} \)
(b) 1
(c) \( \frac{1}{4} \)
(d) 2
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